Hydraulic motor.



No. 865,078- PATENT ED SEPT. 3, 1907.

- T. P. BULLARD.

HYDRAULIC MOTOR.

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THOMAS PERRY BULLARD, OF RICHMOND, VIRGINIA.

HYDRAULIC MOTOR.

Specification'of Letters Patent.

Patented Sept. 3, 1907.

Application filed December 13,1906. Serial No- 347,711.

To all whom it may concern:

Be it known that I, THOMAS PERRY BULLARD, a citizen of the United States, and a resident of Richmond, county oi Henrico, and State of Virginia, have invented certain new and useful Improvements in Hydraulic Motors, of which the following is a full and clear specification, reference being had to the accompanying drawings, in which Figure 1 is a side elevation of the motor with one side of the casing removed and the connecting bolts shown in cross section; Fig. 2 a vertical cross section of the motor taken centrally through the same; Fig. 3 a transverse section on the line 33 of Fig. 1; and Fig. 4 a plan view of the inlet side of the motor.

The object of this invention is to provide a simple construction whereby a high degree of efficiency and durability is secured and also whereby the motor is rendered readily reversible, the reversal being secured by the simple operation of closing one cock and opening another, as more fully hereinafter set forth.

To the accomplishment of this object and such others as may hereinafter appear, the invention consists of the parts and combination of parts hereinafter fully described and particularly pointed out in the appended claims, reference being had to the accompanying drawings forming a part of this specification in which the same reference characters designate like parts throughout the several views.

Referring to the drawings annexed by reference characters, b designates the shaft to be driven on which is secured by means of suitable set-screws b the wheel B provided with a rim or felly b which is covered with a leather or other flexible packing strip 1, this strip being held in place by means of an annular metal band I which clamps the leather to theperiphery of the tire. Attached to this wheel rim is a series of three or more radial pistons b circular in shape. The pistons work in an annular water chamber a formed between two circular casings A and A which are bolted together by suitable bolts passing through radial ears a. At one side this water passage is provided with an exhaust or exit a and at a diametrically opposite point the casing is provided with two lateral inlets G and H disposed at opposite sides of a gate or abutment F, which latter is radially movable and when in its inward position divides the water channel at a point between said two inlets. This abutment F works through a radial slot formed in the casing. The two casings fit closely against the oppositefaces of the leather packing I carried by the wheel rim and thus prevent leakage of water out past the rim.

Connected to the side of the casing section A is a box or chest 0 which covers the inlets H and G. Connected to the inlet H through said box C is a supply pipe 0 which is provided with a suitable valve or cook 0 and connected to the inlet G is a similar pipe 0 provided with asimilar valve or cock 0. These sup.

connect them to the water main. In the inlets II and G are placed suitable gates D and D which when forced down close the inlets. mally held open and are operated by means of a pair of levers d and d which are crossed and pivoted at their intersection at a" and each of which is provided with an extension (2 and d These extensions project laterally from the gates and overlie a pair of parallel arms E and E which lie upon the outer face oi the casing and extend across the top edge of the abutment F. These arms are pivoted at their opposite ends to the casing and the arm E is provided with a finger e which extends into the annular water passage and inclines toward the abutment. The other arm E is provided with a similar finger e which also extends into the water passage and toward the abutment. When these fingers are moved out of the pathway of the These gates are norpistons b they fold into recesses a formed in the inner wall of the water passage.

The abutment F is provided with a radially extend ing bolt or pin f, surrounding which is a coil spring f which normally forces a bar f down upon the two arms E and E thus holding said arms against the outer wall of the casing and the outer or upper edge of the abutment.

It will be observed that when the water is turned into inlet G the pistons and the wheel will be driven in the direction of the arrow shown in Fig. 1 and as each piston passes exhaust port a the exhaust will take place. While water is thus being let in through port G of course valve 0 in controlling port H is closed. To reverse the motor it is simply necessary to close valve or cock 0 and open said valve or cook 0 If the valved pipes be undesirable it will be observed that instead of the same a suitable supply hose may be detachably connected to the inlets, so that the motor may be reversed 'by simply detaching the supply hose from one inlet and attaching it to the other.

When one of the pistons b strikes one of the lingers e or c it will, through the medium of arm E or E and cross bar f raise the abutment F far enough to permit the piston to pass it. The spring f 2 cushions the blow and serves also to normally hold the parts in position. It will be obvious that when the abutment F is thus lifted it will be necessary to shut off the supply of n10- tive liquid until the gate is again closed. This is accomplished by the arms E and E raising the free ends of the levers d and d and thus causing both the gates to descend and close both inlet passages.

It will be obvious that the parts shall be so proportioned and nicely mounted as to permit the weight of the extensions 01 and d to not only assist in holding the arms E and E in position against the casing but also to hold up the gates D and D. It will be observed also that when either of the fingers e or e is swung up into the recess a both the arms E and E are swung outwardly on their pivots by reason of the fact that both arms are clamped by spring f 2 and short bar f against the upper edge of the abutment; that is to say, the operation of either arm E or E will cause a similar movement of the companion arm; The return of the parts to .normal position is accomplished not only by the weight of the parts, namely, extensions (1 d the abutment F and the arms E, E, e, e, but also because of the fact that when the arms E and E are swung outwardly they are shifted so as 0 cross each other at a point directly under the short bar f and thereby compress spring f thus utilizing the extensive force of the spring to return the arms E and E to a parallel normal position.

Having thus fully descibed my invention, what I claim and desire to secure by Letters Patent, is:

In a motor, a casing having an annular passage, an exit at one side and a pair of inlets at the opposite side, a radial abutment between these inlets, a wheel carrying radial pistons working in the annular passage in the casing, a finger or arm pivoted to the casing at each side of the abutment and inclining inwardly toward the abutment, each finger being provided with an arm extending across the top of the abutment, said arms lying parallel with each other, a bar and means for resiliently pressing it upon the upper sides of these arms, and means operated by the rise of said arms to automatically close the inlets.

In testimony whereof I hereunto aflix my signature in the presence of two witnesses this 12 day of Dec. 1906.

'l. PERRY BULLARD.

Witnesses W. E. ROBERTSON, E. L. SPENCE. 

